Pedal travel measuring device and automobile

Abstract

The utility model belongs to the technical field of automobile accessories, and particularly discloses a pedal travel measuring device and an automobile. The pedal travel measuring device comprises a mounting shell, a piston rod, a magnet assembly, a PCB and a chip, wherein the mounting shell is provided with a first mounting hole; the piston rod penetrates through the first mounting hole, the piston rod can move relative to the mounting shell, and the piston rod is used for being connected with a pedal; the magnet assembly comprises a transmission part and a magnet, the transmission part is provided with an input end and an output end, the input end of the transmission part is connected with the piston rod, the magnet is connected with the output end of the transmission part, and when the piston rod moves, the transmission part drives the magnet to rotate; the PCB is located on one side of the installation shell, the chip is arranged on the PCB, and the chip and the magnet are oppositely arranged in a spaced mode. The device is convenient to install, and the cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile accessories, and in particular relates to a pedal stroke measuring device and an automobile. Background Art

[0002] With the continuous development of automobile electrification and intelligence, the demand for the development of electromechanical and hydraulic servo braking systems is increasing. The pedal travel measurement device is the core component of the entire system, which is used to sense the driver's braking intention and ensure that the system provides the required braking force.

[0003] The magnet assembly and chip assembly of the pedal stroke measuring device in the related art are both arranged on the hydraulic valve block of the brake system, wherein the magnet assembly is fixed on the piston rod, the hydraulic valve block is connected with the piston rod, and the end of the piston rod away from the hydraulic valve block is connected to the pedal. The chip assembly includes a plastic bracket, a circuit board assembly and a connecting terminal, the plastic bracket is connected to the hydraulic valve block, and the connecting terminal is connected to the controller through a connecting spring. When the driver steps on the pedal, the piston moves with the pedal, thereby driving the magnet assembly to move, and the chip assembly detects the displacement information of the pedal through the change of the magnetic field. However, the chip assembly in the related art is connected to the controller through a connecting terminal and a connecting spring, which has high requirements on position accuracy, is not easy to install, and has high cost. Summary of the invention

[0004] The utility model aims to solve one of the technical problems in the related art at least to a certain extent. To this end, the embodiment of the utility model provides a pedal stroke measuring device, which is easy to install and reduces costs.

[0005] The embodiment of the utility model also provides a car.

[0006] The pedal stroke measuring device of the embodiment of the utility model includes: a mounting shell, the mounting shell has a first mounting hole; a piston rod, the piston rod passes through the first mounting hole, and the piston rod is movable relative to the mounting shell, and the piston rod is used to be connected to the pedal; a magnet assembly, the magnet assembly includes a transmission component and a magnet, the transmission component has an input end and an output end, the input end of the transmission component is connected to the piston rod, and the magnet is connected to the output end of the transmission component, when the piston rod moves, the transmission component drives the magnet to rotate; a PCB board and a chip, the PCB is located on one side of the mounting shell, the chip is arranged on the PCB board, and the chip and the magnet are arranged relative to each other at a distance.

[0007] It can be understood that when the pedal is stepped on, the piston rod moves. As the piston rod moves, the transmission component converts the movement of the piston rod into rotational motion and drives the magnet to rotate. The chip detects the rotation angle of the magnet through changes in the magnetic field, so that the displacement of the piston rod can be inferred according to the rotation angle of the magnet to determine the driver's braking intention. In this embodiment, the chip is directly set on the PCB board, and there is no need to set a complex connection structure between the chip and the PCB board and the mounting shell. The position requirement is low, the installation is convenient, and the cost can be reduced.

[0008] In this embodiment, the distance between the magnet and the chip is P, 2mm≤P≤4mm.

[0009] In this embodiment, a second mounting hole is provided on the mounting shell, and the transmission component includes: a rack, which is arranged on the piston rod and extends along the axial direction of the piston rod; a connecting rod, which passes through the second mounting hole and is rotatable relative to the mounting shell, and the magnet is connected to the connecting rod; and a gear, which is arranged on the connecting rod and is meshed with the rack.

[0010] In this embodiment, the rack and the piston rod are integrally formed.

[0011] In this embodiment, active teeth are arranged on the side wall of the piston rod, and the active teeth form the rack.

[0012] In this embodiment, the magnet is bonded to the end of the connecting rod.

[0013] In this embodiment, the pedal stroke measuring device further includes a bearing, wherein the bearing is arranged outside the connecting rod and the bearing is located in the second mounting hole.

[0014] In this embodiment, the magnet is a circular magnet / annular magnet, and the N pole and S pole of the circular magnet / annular magnet are distributed along the radial direction of the circular magnet / annular magnet.

[0015] In this embodiment, the piston rod includes a rod body and a limiting portion, the rod body passes through the first mounting hole, and the limiting portion is arranged on the rod body and located outside the mounting housing.

[0016] A car comprises the above-mentioned pedal stroke measuring device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a pedal stroke measuring device according to an embodiment of the utility model.

[0018] Figure 2It is a three-dimensional diagram of the pedal stroke measuring device of the embodiment of the utility model after removing the PCB board and the chip.

[0019] Figure 3 It is a structural schematic diagram of a piston rod and a magnet assembly according to an embodiment of the utility model.

[0020] Reference numerals:

[0021] 1. Mounting shell; 11. First mounting hole; 12. Second mounting hole; 2. Piston rod; 21. Rod body; 22. Limiting part; 3. Magnet assembly; 31. Transmission component; 311. Rack; 312. Connecting rod; 313. Gear; 32. Magnet; 4. PCB board; 5. Chip. DETAILED DESCRIPTION

[0022] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0023] In this embodiment, if Figure 1 and Figure 2 As shown, the pedal stroke measuring device includes a mounting housing 1, a piston rod 2, a magnet assembly 3, a PCB board 4 and a chip 5. The mounting housing 1 has a first mounting hole 11; the piston rod 2 passes through the first mounting hole 11, and the piston rod 2 is movable relative to the mounting housing 1, and the piston rod 2 is used to be connected to the pedal (not shown in the figure); the magnet assembly 3 includes a transmission component 31 and a magnet 32, the transmission component 31 has an input end and an output end, the input end of the transmission component 31 is connected to the piston rod 2, and the magnet 32 ​​is connected to the output end of the transmission component 31. When the piston rod 2 moves, the transmission component 31 drives the magnet 32 ​​to rotate. The PCB is located on one side of the mounting housing 1, the chip 5 is arranged on the PCB board 4, and the chip 5 and the magnet 32 ​​are arranged relative to each other at intervals.

[0024] For example, the mounting housing 1 is a hydraulic valve block, which has a valve cavity, a first mounting hole 11 is arranged on the side wall of the mounting housing 1 and communicates with the valve cavity, a piston rod 2 passes through the first mounting hole 11, one end of the piston rod 2 is located in the valve cavity, and the other end is located outside the valve cavity. The end of the piston rod 2 located outside the valve cavity is connected to the pedal, and the end of the piston rod 2 located in the valve cavity is connected to the valve body in the valve cavity. The transmission component 31 is at least partially located in the valve cavity, and the magnet 32 ​​is located outside the mounting housing 1. The magnet 32 ​​will not be affected by the liquid in the mounting housing 1, so that the magnetic field is more stable, which is conducive to ensuring the accuracy of the measurement result.

[0025] Specifically, the PCB board 4 is the PCB board 4 of the controller, and the chip 5 is electrically connected to the PCB board 4. The model of the chip 5 can be A31315, and the connection method between the chip 5 and the PCB board 4 of the controller is conventional prior art, which will not be described in detail here.

[0026] It can be understood that when the pedal is stepped on, the piston rod 2 moves. As the piston rod 2 moves, the transmission component 31 converts the movement of the piston rod 2 into a rotational motion and drives the magnet 32 ​​to rotate. The chip 5 detects the rotation angle of the magnet 32 ​​through the change of the magnetic field, so that the displacement of the piston rod 2 can be calculated according to the rotation angle of the magnet 32 ​​to determine the driver's braking intention. In this embodiment, the chip 5 is directly arranged on the PCB board 4, and there is no need to set a complex connection structure between the chip 5 and the PCB board 4 and the mounting shell 1. The position requirement is low, the installation is convenient, and the cost can be reduced.

[0027] In this embodiment, the distance between the magnet 32 ​​and the chip 5 is P, 2mm≤P≤4mm.

[0028] For example, the distance P between the magnet 32 ​​and the chip 5 can be 2 mm, 2.2 mm, 2.5 mm, 2.8 mm, 3 mm, 3.2 mm, 3.5 mm, 3.7 mm or the like. If the distance between the magnet 32 ​​and the chip 5 is too large, the magnetic field strength is weak, which is not conducive to the chip 5 sensing the magnetic field change, thereby affecting the accuracy of the measurement result. If the distance between the magnet 32 ​​and the chip 5 is too small, there will be a magnetic saturation point and affect the measurement.

[0029] In this embodiment, by setting the distance between the magnet 32 ​​and the chip 5 to be between 2 mm and 4 mm, it is beneficial for the chip 5 to sense the change of the magnetic field, thereby improving the accuracy of the measurement result.

[0030] In this embodiment, if Figures 1 to 3 As shown, the mounting shell 1 has a second mounting hole 12, and the transmission component 31 includes a rack 311, a connecting rod 312 and a gear 313. The rack 311 is arranged on the piston rod 2, and the rack 311 extends along the axial direction of the piston rod 2; the connecting rod 312 passes through the second mounting hole 12, and the connecting rod 312 is rotatable relative to the mounting shell 1, and the magnet 32 ​​is connected to the connecting rod 312; the gear 313 is arranged on the connecting rod 312, and the gear 313 and the rack 311 are meshed.

[0031] Specifically, Figure 2 As shown, the second mounting hole 12 is arranged on the side wall of the mounting housing 1, the side wall where the first mounting hole 11 is located is adjacent to the side wall where the second mounting hole 12 is located, and the axial directions of the first mounting hole 11 and the second mounting hole 12 are perpendicular to each other.

[0032] It is understandable that when the piston rod 2 moves, it drives the rack 311 to move, and the gear 313 and the rack 311 are meshed for transmission, so that when the rack 311 moves, the gear 313 can be driven to rotate, thereby driving the connecting rod 312 to rotate through the gear 313, and then the connecting rod 312 drives the magnet 32 ​​to rotate.

[0033] In this embodiment, the rack 311 and the piston rod 2 are integrally formed.

[0034] It is understandable that integrally forming the rack 311 and the piston rod 2 can improve the connection strength between the rack 311 and the piston rod 2, which is beneficial to the stable operation of the transmission component 31, and there is no need to set a connecting component between the rack 311 and the piston rod 2, which can save space and connection procedures.

[0035] In this embodiment, if Figure 3 As shown, active teeth are arranged on the side wall of the piston rod 2 , and the active teeth form a rack 311 .

[0036] For example, the active teeth can be formed by milling on the piston rod 2. Of course, the processing method of the active teeth can be selected according to actual needs and is not limited here.

[0037] By forming the active teeth on the side wall of the piston rod 2, space can be further saved and the overall structure can be made more compact.

[0038] In this embodiment, the magnet 32 ​​is bonded to the end of the connecting rod 312 .

[0039] For example, the magnet 32 ​​is adhered to the end of the connecting rod 312 by AB glue. Of course, the magnet 32 ​​can also be adhered to the end of the connecting rod 312 by other glue.

[0040] It is understandable that by bonding the magnet 32 ​​to the end of the connecting rod 312, there is no need to set connecting parts, nor to open connecting holes on the magnet 32 ​​and the connecting rod 312, etc., thereby saving space and reducing processing difficulty.

[0041] In this embodiment, the pedal stroke measuring device further includes a bearing, which is disposed outside the connecting rod 312 and is located in the second mounting hole 12 .

[0042] By arranging a bearing between the mounting housing 1 and the connecting rod 312, the friction and resistance of the connecting rod 312 when rotating can be reduced, which is conducive to making the piston rod 2 move more sensitively.

[0043] In this embodiment, the magnet 32 ​​is a circular magnet 32 ​​ / annular magnet 32 ​​, and the N pole and S pole of the circular magnet 32 ​​ / annular magnet 32 ​​are distributed along the radial direction of the circular magnet 32 ​​ / annular magnet 32 ​​.

[0044] Specifically, the magnet 32 ​​may be a circular magnet 32 ​​or a ring magnet 32 ​​and may be configured as required. The shape of the magnet 32 ​​is not limited herein.

[0045] It is understandable that the N pole and the S pole of the magnet 32 ​​are distributed along its radial direction, and the strength of the magnetic field is different in the circumferential direction of the magnet 32, so that the chip 5 can detect the rotation angle of the magnet 32 ​​according to the change of the magnetic field.

[0046] In this embodiment, the piston rod 2 includes a rod body 21 and a limiting portion 22 . The rod body 21 passes through the first mounting hole 11 . The limiting portion 22 is disposed on the rod body 21 and is located outside the mounting housing 1 .

[0047] For example, the limiting portion 22 is a limiting ring, and the limiting ring is fixed on the outside of the piston rod 2 .

[0048] It is understandable that when the piston rod 2 moves, when the limiting portion 22 contacts the outer wall of the mounting housing 1 , the piston rod 2 cannot continue to move in the original direction due to the blocking effect of the limiting portion 22 , thereby facilitating the control of the stroke of the piston rod 2 .

[0049] This embodiment also provides a car, which includes the above-mentioned pedal stroke measuring device.

[0050] In this embodiment, by setting the above-mentioned pedal stroke measuring device, when the driver steps on the pedal, the piston rod 2 moves. As the piston rod 2 moves, the rack 311 on the piston rod 2 moves, and the rack 311 drives the gear 313 to rotate, so that the gear 313 drives the connecting rod 312 to rotate. By converting the movement of the piston rod 2 into a rotational motion and driving the magnet 32 ​​to rotate, the chip 5 detects the rotation angle of the magnet 32 ​​through the change of the magnetic field, so that the displacement of the piston rod 2 can be calculated according to the rotation angle of the magnet 32, so as to judge the driver's braking intention, which is easy to install and helps to reduce costs.

[0051] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0052] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0053] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0055] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0056] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A pedal stroke measuring device, characterized in that: include: A mounting housing, wherein the mounting housing has a first mounting hole; A piston rod, the piston rod passes through the first mounting hole and is movable relative to the mounting housing, and the piston rod is used to be connected to the pedal; A magnet assembly, wherein the magnet assembly comprises a transmission component and a magnet, wherein the transmission component has an input end and an output end, wherein the input end of the transmission component is connected to the piston rod, and the magnet is connected to the output end of the transmission component, and when the piston rod moves, the transmission component drives the magnet to rotate; A PCB board and a chip, wherein the PCB is located at one side of the mounting housing, the chip is arranged on the PCB board, and the chip and the magnet are arranged opposite to each other with a gap.

2. The pedal stroke measuring device according to claim 1, characterized in that: The distance between the magnet and the chip is P, 2mm≤P≤4mm.

3. The pedal stroke measuring device according to claim 1, characterized in that: The mounting housing has a second mounting hole, and the transmission component includes: A rack, the rack being arranged on the piston rod and extending along the axial direction of the piston rod; a connecting rod, the connecting rod passing through the second mounting hole and being rotatable relative to the mounting housing, the magnet being connected to the connecting rod; A gear is arranged on the connecting rod, and the gear is meshed with the rack.

4. The pedal stroke measuring device according to claim 3, characterized in that: The rack is integrally formed with the piston rod.

5. The pedal stroke measuring device according to claim 4, characterized in that: Active teeth are arranged on the side wall of the piston rod, and the active teeth form the rack.

6. The pedal stroke measuring device according to claim 3, characterized in that: The magnet is bonded to the end of the connecting rod.

7. The pedal stroke measuring device according to claim 3, characterized in that: A bearing is also included, and the bearing is arranged outside the connecting rod and located in the second mounting hole.

8. The pedal stroke measuring device according to claim 1, characterized in that: The magnet is a circular magnet / annular magnet, and the N pole and S pole of the circular magnet / annular magnet are distributed along the radial direction of the circular magnet / annular magnet.

9. The pedal stroke measuring device according to claim 1, characterized in that: The piston rod includes a rod body and a limiting portion, the rod body passes through the first mounting hole, and the limiting portion is arranged on the rod body and located outside the mounting housing.

10. An automobile, characterized in that: The invention comprises the pedal stroke measuring device according to any one of claims 1 to 9.

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